Task: Refactor Code Duplication and Enforce Similarities Prevention

## Describe the task
Use pylint's similarities detection to identify and refactor duplicated code throughout the `data/src/` pipeline, then update the pre-commit configuration to prevent future code duplication. The current pre-commit hook for similarities checking is non-blocking and reveals multiple opportunities to reduce code duplication and technical debt. This task involves running the pylint similarities analysis, refactoring identified duplications, and then switching the pre-commit hook from non-blocking to blocking mode to enforce code quality standards and prevent new duplicated code from being introduced.

## Acceptance Criteria
- [ ] Run pylint similarities check on `data/src/` to generate a comprehensive report of code duplication
- [ ] Refactor identified duplicated code by extracting common functionality into reusable components
- [ ] Ensure all existing tests continue to pass after refactoring changes
- [ ] Update pre-commit hook configuration to make pylint similarities check blocking (remove `|| true`)
- [ ] Update relevant code comments and documentation to reflect structural changes

## Additional context
- Use the existing pylint similarities configuration: `pylint --disable=all --enable=similarities --score=no data/src/`
- Prioritize changes that provide the most significant reduction in technical debt